Textile spinning, doubling, and twisting machine



y 1953 J. J. HAYTHORNTHWAITE ET AL 2,638,733

TEXTILE SPINNING, DOUBLING, AND TWIS TING MACHINE Filed April 4, 1951 3 Sheets-Sheet l May 19, 1953 J. J. HAYTHORNTHWAITE ETAL 8,

TEXTILE SPINNING, DOUBLING, AND TWISTING MACHINE Filed April 4, 1951 3 Sheets-Sheet 2 y 1953 J. J. HAYTHORNTHWAITE ETAL. ,7

TEXTILE SPINNING, DOUBLING, AND TWISTING MACHINE Filed April 4, 1951 5 Sheets-Sheet 5 Patented May 19, 1953 TEXTILE SPINNING, DOUBLING, AND TWISTING MACHINE James Jackson Haythorn'thwaite and Vernon George Pinner, Accrington, England, assignors to T. M. M. (Research), Limited, Rossendale,

England Application April 4, 1951, Serial No. 219,142

, In Great Britain April 26, 1950 The object of this invention is to provide an improved form of manual or pedal-operated remote-controlled brake for the spindles of a textile spinning, doubling or twisting machine, which will obviate the disadvantage possessed by existing brakes of such kind that the braking pressure applied to the spindle is proportional to the force applied by the operator, with the result that an excessive force carelessly applied may damage the working parts of the spindle by straining the same laterally in its mounting.

A spindle brake apparatus accordingto the invention comprises means whereby the actuation of a manual or pedal lever operates to compress a spring by which the brake shoe is applied to the spindle with a predetermined pres sure, and a stop serving to prevent an excessive movement of said lever. The brake may be applied through the medium of a Bowden cable connection having means whereby the effective length of the cable may be adjusted for regulation of the braking pressure applied by "said spring.

One embodiment of this invention, applied to a pedal-controlled brake for the spindle of a ring spinning frame incorporating rising and falling spindle rails, is illustrated by way of example in the accompanying drawings andhereinafter described with reference thereto. In said drawings, Fi 1 is a side elevation of the brake apparatus together with the spindle unit with which it is associated, the parts of the machine frame upon which the spindle unit and the actuating pedal are mounted being shown in section. This figure also illustrates the relative positions of the parts when the spindle rail is at its highest and lowest positions. Fig. 2 is a front elevation of the apparatus. Figs. 3 and 4 are sec tions taken respectively on the lines III--III and IV-IV of Fig. 2.

As will be seen from the drawings, the spindle mounting incorporates an off-set bracket l on which is pivoted a bell-crank lever 2, 3. The climb 2 of said lever carries a brake pad 4 in a position adjacent to a rotating part 5 of the spindle wharve 6, and the other limb 3 forms an anchorage for one end of a length of flexible wire cable 1 which is sheathed in a sleeve 8 after the manner of the well-known Bowden cable.

Pivoted upon a fulcrum shaft 9 extending along the front of the bottom rail 10 of the machine framing is a pedal H provided with a lug l2 adapted to abut against the underside of said rail l0 when the lever is depressed, thereby constituting a stop which prevents excessive demovement thereof 6 Claims. C1. 5788) pression of the pedal II in use. Also part of the pedal is an upstanding lever l3 which, when the pedal H is depressed, serves to communicate the to a second lever l4 (called the pressure lever) which is also mounted on the fulcrum shaft 9. Between said two levers I3 and I4 is situated a compression spring l5 which is carried on a retaining stud l6 passing through oppositely located holes in the levers; said compression spring l5, which is pre-loaded to a given extent, is hereinafter referred to as the"pressure spring.

The pressure lever l4 provides at its extremity an attachment for the end of theBowden cable I, which passes through a vertical flange of the bottom rail l0, and the adjacent end of the cable outer sleeve 8 is received in ashou1- dered socket I1 surrounding the hole in the rail flange on the inner face thereof.

A light return spring I8 is provided between the limb 3 of the bell-crank brake lever 2, 3 and the bracket 1 supporting the latter, and the adjacent end of the cable outer sleeve 8 is arranged to bear against the end of a tubular stud l9 adjustably mounted in the underside of said bracket l, the cable I passing axially through said stud l9 and throughthe bracket l to its connection with the bell-crank lever limb 3.

The brake pedal H is located upon the ful crum shaft 9 by means of a grub-screw 20 which takes into a circumferential groove 2! in the shaft. The same shaft 9 serves as a common fulcrum for the brake pedals of a number of brake apparatuses the positions of some of which are indicated in Fig. 2 by the dotted lines A, B, C, D etc. Said shaft 9 is supported in bearers 22, 22 which are bolted to the rail I0.

When operated, the pedal ll pivots about the fulcrum shaft 9 and abuts at l2 against the rail H). In doing so, it compresses the pressure spring l5 against the pressure lever H which in turn exerts tension on the cable 1 and actuates the bell-crank lever 2, 3 to press the brake pad 4 against the spindle part 5.

The retaining stud l6 of the pressure spring I5 is so adjusted that the latter is compressed sufficiently to overcome the oppositely directed pressure of said return spring l8 andto apply the brake with a suitable force.

When the brake pedal II is released, the pressure of the pressure spring I5 is resisted by the head of the retaining stud [6, allowing the return spring I8 to restore the parts to the brakeoff position, raising the pedal H. The effective length ofthe cable I is altered for the purpose of regulating the degree of pressure which can be applied to the brake, by adjusting the tubular stud I9 against which the outer cable sleeve 8 abuts.

A pedal-operated brake constructed as herein described is particularly suitable for use in machines in which the spindle rails are raised and lowered in relation to a stationary ring rail, since the flexible cable connection between the pedal and the brake lever adapts itself conveniently to the movement of the spindle rail, as depicted in Fig. 1, without affecting the operation of the brake. It will however be evident that such a brake is equally applicable in other types of ma chines, and that it can equally well be actuated by a manual lever.

What we claim as our invention and desire to secure by Letters Patent is:

l. A spindle brake apparatus for textile spinning, doubling or twisting machines comprising, the combination with the spindle of a brake shoe cooperative therewith, a common movable support for the brake shoe and spindle, a manually operable lever located at a point remote from the brake shoe, a stationary support for the lever, and, means responsive to the lever for applying the brake shoe with limited force including a compression spring actuated by the lever, a stop means for limiting movement of the lever,

an operative connection from the compression spring to the brake shoe comprising a Bowden cable, and means for adjustin the efiective length of the cable for the purpose of regulating the maximum braking pressure which can be applied by said spring.

2. A spindle brake apparatus as set forth in claim 1 in which a secondary lever is provided, with the compression spring interposed between the manually operable lever and said secondary lever, the secondary lever constituting a part of the operative connection from the compression spring to the brake shoe and. being interposed between the compression spring and the Bowden cable.

3. A spindle. brake apparatus as set forth in L claim 1 in which a secondary lever is provided, with the compression spring interposed between the manually. operable lever and said secondary lever, the secondary lever constituting a part of the operative connection from the compression spring to the brake shoe and being interposed between the compression spring and the Bowden cable, the manually operable lever and the seconclary lever being mounted upon a common pivot with the spring compressed between them.

4. A spindle brake apparatus as claimed in claim 1 in which the manually operable lever is a pedal, the pedal having a lug and the pedal support an abutment portion cooperative with the lug, said lug and abutment portion constituting the stop means for limiting movement of the pedal.

5. A spindle brake apparatus as set forth in claim 1 which includes a bell crank lever pivotally mounted on the movable spindle support, one limb of the bell crank lever carrying the brake shoe in cooperative relation to the spindle, and the other limb being connected to the flexible Bowden cable, said bell crank constituting a part of the operative connection from the compression spring to the brake shoe.

6. A spindle brake apparatus as set forth in claim 1 which includes a bell crank lever pivot ally mounted on the movable spindle support, one limb of the bell crank lever carrying the brake shoe in cooperative relation to the spindle, and the other limb being connected to the flexible Bowden cable, said bell crank lever consti tuting a part of the operative connection from the compression spring to the brake shoe, and a further compression spring interposed between the bell crank lever and the spindle support, and arranged to be compressed when the mechanism is actuated to apply the brake, and to restore the parts to brake-off position when the braking pressure is released.

JAMES. JACKSON HAYTHORNTHWAITE. VERNON .GEORGE PINNER.

References Cited in the file of this patent UNITED STATES PATENTS Number 

